I have been playing through version 8 the last couple days and have some comments:
Level 1 2S2W: Heading down this staircase takes me to a part of level 16 but there is no way to leave that part without restoring. This is a backtracking issue and needs to be fixed.
Level 2 2S1W: I did not use the orbs at (7,20) and (11,24). What are they for?
Level 5 7S2W: I suggest adding a green door at the south end and to mark this room as not required so that the Level Clear chimes play when the player is ready to go to that room.
Level 7: Did you add a room to this level that I cannot find? I cleared all 13 of the rooms I did last time but the blue door is still closed.
Suggestions for checkpoints:
Click here to view the secret text
×Level 2 1N: Add checkpoints at (7,5), (20,26), and (27,4).
Level 2 1W: Add checkpoints at (16,14) and (18,2).
Level 2 1E: Add checkpoints at (26,26), (14,20), and (26,14).
Level 2 1S1W: Add checkpoints at (11,9) and (6,25).
Level 2 1S1E: Add checkpoint at (31,22)
Level 2 2S1E: Add checkpoints at (7,19) and (7,2).
Level 2 3S1W: Add checkpoints at (12,22) and (27,22).
Level 3 1N1E: Add checkpoints at (11,14), (19,14), and (27,14)
Level 3 1N: Add checkpoint at (19,14).
Level 3 2S: Add checkpoints at (28,6), (9,21), (23,21), (2,27), and (35,27).
Level 3 1S2E: Add checkpoints at (28,10), (13,10), and (13,21).
Level 3 2S1E: Add checkpoints at (6,15), (18,5), (32,1), (25,24), (6,25), and (35,30).
Level 4 2N4E: Add checkpoints at (4,5), (4,27), (33,5), and (34,27).
Level 4 2N2E: Add checkpoints at (29,22), (28,11), (26,13), (22,14), and (14,12).
Level 4 1N3E: Add checkpoints at (16,1), (16,30), and (1,16).
Level 4 1N2E: Add checkpoint at (8,5).
Level 4 2E: Add checkpoint at (20,20).
Level 4 3E: Add checkpoint at (18,13).
Level 5 2S1W: Add checkpoints at (31,6), (17,6), (17,17) and (31,17).
Level 5 4S1W: Add checkpoints at (19,5), (32,18), and (16,21).
Level 5 3S3W: Add checkpoints at (30,4), (6,4), (11,21), (21,19), and (34,26).
Level 5 5S3W: Add checkpoint at (8,18).
Level 5 4S4W: Add checkpoints at (12,5), (2,29), (15,20), (35,29), (28,19), and (30,8).
Level 6 1N2E: Add checkpoint at (17,19).
Level 6 2N2E: Add checkpoint at (16,19).
Level 6 4N2E: Add checkpoints at (3,23), (22,10), and (35,14).
Level 6 3N1E: Add checkpoint at (20,26).
Level 6 1N1E: Add checkpoints at (10,21) and (28,3).
Level 6 1N: Add checkpoints at (5,5), (5,25) and (35,5).
Level 6 2N: Add checkpoints at (4,4), (33,27), (33,4), and (4,27).
Level 6 2N1W: Add checkpoints at (3,3) (3,28), (34,28), and (34,3).
Level 7 1S1W: Add checkpoint at (35,18).
Level 7 2S: Add checkpoint at (12,19).
Level 7 2S1E: Add checkpoints at (36,2), (10,18), and (27,18).
Level 7 2E: Add checkpoints at (35,2), (2,29), (11,17), and (26,11).
Level 7 1S2E: Add checkpoints at (20,4) and (20,28).